First off, this plug-in is quite amazing! It customizes very easily and does nearly anything one could want on the petition/campaign front.
I was wondering, do you have any future plans for integration with Constant Contact mailing lists, Mailchimp, etc? I believe this would be a huge help if one could automatically port new contacts over to their mailing lists. Possibly something similar to how the plugins "Contact Form 7 - Constant Contact Module" works together with "Constant Contact" & "Contact Form 7"?
Ideally, this could work for all major email management apps ala Mail Chimp, Constant Contact, Etc.